1 /* $OpenBSD: control.c,v 1.23 2019/05/31 11:34:09 nicm Exp $ */ 2 3 /* 4 * Copyright (c) 2012 Nicholas Marriott <nicholas.marriott@gmail.com> 5 * Copyright (c) 2012 George Nachman <tmux@georgester.com> 6 * 7 * Permission to use, copy, modify, and distribute this software for any 8 * purpose with or without fee is hereby granted, provided that the above 9 * copyright notice and this permission notice appear in all copies. 10 * 11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 15 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER 16 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING 17 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18 */ 19 20 #include <sys/types.h> 21 22 #include <event.h> 23 #include <stdlib.h> 24 #include <string.h> 25 #include <time.h> 26 27 #include "tmux.h" 28 29 /* Write a line. */ 30 void 31 control_write(struct client *c, const char *fmt, ...) 32 { 33 va_list ap; 34 35 va_start(ap, fmt); 36 evbuffer_add_vprintf(c->stdout_data, fmt, ap); 37 va_end(ap); 38 39 evbuffer_add(c->stdout_data, "\n", 1); 40 server_client_push_stdout(c); 41 } 42 43 /* Write a buffer, adding a terminal newline. Empties buffer. */ 44 void 45 control_write_buffer(struct client *c, struct evbuffer *buffer) 46 { 47 evbuffer_add_buffer(c->stdout_data, buffer); 48 evbuffer_add(c->stdout_data, "\n", 1); 49 server_client_push_stdout(c); 50 } 51 52 /* Control error callback. */ 53 static enum cmd_retval 54 control_error(struct cmdq_item *item, void *data) 55 { 56 struct client *c = item->client; 57 char *error = data; 58 59 cmdq_guard(item, "begin", 1); 60 control_write(c, "parse error: %s", error); 61 cmdq_guard(item, "error", 1); 62 63 free(error); 64 return (CMD_RETURN_NORMAL); 65 } 66 67 /* Control input callback. Read lines and fire commands. */ 68 void 69 control_callback(struct client *c, int closed, __unused void *data) 70 { 71 char *line; 72 struct cmdq_item *item; 73 struct cmd_parse_result *pr; 74 75 if (closed) 76 c->flags |= CLIENT_EXIT; 77 78 for (;;) { 79 line = evbuffer_readln(c->stdin_data, NULL, EVBUFFER_EOL_LF); 80 if (line == NULL) 81 break; 82 if (*line == '\0') { /* empty line exit */ 83 c->flags |= CLIENT_EXIT; 84 break; 85 } 86 87 pr = cmd_parse_from_string(line, NULL); 88 switch (pr->status) { 89 case CMD_PARSE_EMPTY: 90 break; 91 case CMD_PARSE_ERROR: 92 item = cmdq_get_callback(control_error, pr->error); 93 cmdq_append(c, item); 94 break; 95 case CMD_PARSE_SUCCESS: 96 item = cmdq_get_command(pr->cmdlist, NULL, NULL, 0); 97 item->shared->flags |= CMDQ_SHARED_CONTROL; 98 cmdq_append(c, item); 99 cmd_list_free(pr->cmdlist); 100 break; 101 } 102 103 free(line); 104 } 105 } 106